fix(mongo): mongo start waiting forever for old mongo versions

[fran-penedo]

Old versions of Mongo, like 3.6, log the message "waiting for connections [...]", with a lowercase 'w', while newer versions log the message with uppercase 'W'. This commit makes the log search when starting the container case insensitive.

[codecov[bot]]

Codecov Report

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Additional details and impacted files

@@           Coverage Diff           @@
##             main     #783   +/-   ##
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  Coverage        ?   85.32%           
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  Files           ?       12           
  Lines           ?      668           
  Branches        ?      105           
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  Hits            ?      570           
  Misses          ?       75           
  Partials        ?       23           

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